Technical Specification
1.Structure: Two concentric borosilicate glass
2.Material: Borosilicate glass 3.3
3.Glass thickness: 1.6mm
4.Thermal expansion: 3.3 × 10-6°C
5.Outer/Inner tube diameter: 47mm/37mm
58mm/47mm
6.Outer tube diameter×Length: 47mm×1500m/1600mm/1800mm
58mm×1500mm/1600mm/1800mm/2000mm/2100mm
7.Selective coating: SS-AlN/Cu
8.Absorptance: 0.90-0.95(AM1.5)
9.Emittance: 0.04~0.06(80°C+-5°C)
10.Vacuum degree: P≤5.0×10-3 (Pa)
11.Stagnation temperature: 260~300°C
12.Heat loss: ULT= 0.4~0.6w/(m2.°C)
13.Resistance: Hail diameter≤ 25mm
14.Solar irradiation for obtaining a preset water temperature rise in an all-glass evacuated solar collector tube under stagnation: H=3.7~4.2 MJ/m2(58mm); H=2.9~3.2MJ/m2(47mm)
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